Quarterly report pursuant to Section 13 or 15(d)

Retirement Benefit Plans (Net Periodic Expense) (Details)

v3.10.0.1
Retirement Benefit Plans (Net Periodic Expense) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 03, 2018
USD ($)
Oct. 28, 2017
USD ($)
Rate
Apr. 29, 2017
USD ($)
employee
Nov. 03, 2018
USD ($)
Oct. 28, 2017
USD ($)
Rate
Mar. 31, 2017
Rate
Jan. 28, 2017
Rate
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]              
Number of employees eligible for VERP | employee     6,000        
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate | Rate   3.94%     3.94% 4.34% 4.40%
Service cost $ 9 $ 11   $ 28 $ 32    
Interest cost 34 38   104 114    
Expected return on plan assets (55) (53)   (167) (160)    
Amortization of prior service cost/(credit) 2 1   6 5    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement 0 12   0 12    
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 0 $ (7) 0 7    
Net periodic pension expense/(income) (10) 9   (29) 122    
Number of employees accepted VERP | employee     2,800        
Defined Benefit Plan, Benefit Obligation, Special and Contractual Termination Benefits 0 0 $ (112) 0 112    
Other components of net periodic pension cost/(income) $ (19) $ (2) [1]   $ (57) $ 90 [1]    
[1] As Adjusted